| Sally, look for Bayer Advanced Rose & Flower ready to spray. Use this a few times a week or 2 apart, and that should get rid of the scale. It is systemic and is very easy on your plant. If you have too many plants which make the Rose and Flower too expensive, use the Tree and Shrub formula mixed to give you the same concentration of imidacloprid as the Rose & Flower.
The one case where a sticky substance is a worry is if it is leaking over a large area instead of just at a few joints. The large area stickiness will likely be mites, which you will need a very strong magnifying glass to see. Under the disease section is a 'sticky' on mites.
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Cynthia
Prescott Orchid Society  |